U.S. airlines this week filed for permission to fly the first regularly scheduled routes to Cuba in over half a century.

International service to and from the U.S. is tightly regulated. The number of applications for service to Havana in particular exceeded the amount of available routes, meaning regulators will have to distribute the flights among the airlines requesting access.

Below is a list of the major U.S. airlines and their proposed Cuba service. These airlines could get permission to fly some or all of their requested routes, with flights potentially beginning as early as this fall. Air travel from the U.S. to Cuba is currently limited to chartered aircraft only.